.NET / React / AWS Tech Lead

NES Fircroft; Paris; Hybride; EUR 120 000 - 160 000; Plein temps

Résumé du poste

NES Fircroft is seeking a .NET / React / AWS Tech Lead for a 12-month contract in Paris, hybrid work arrangement (3 days on site, 2 days remote). The role requires fluent French and strong English, with at least 8 years in software development and 18+ months in a tech lead position.

The candidate will lead a B2B SaaS platform team, drive architectural decisions, and ensure high-quality delivery. The ideal candidate will have deep experience in .NET/C#, AWS, REST APIs, React, and microservices,

Qualifications

• 8+ years of software development experience with at least 18 months as Tech Lead or senior developer on a development team.
• Proficient in .NET / C#, AWS, REST APIs, React and microservices architecture.
• Experience with unit/integration testing, CI/CD, Git, and production incident management.
• Ability to diagnose incidents, provide technical leadership, and support development teams.
• Familiarity with AI tools for code development, testing, or analysis.

Responsabilités

• Provide local technical leadership for the squad, clarifying standards and facilitating day-to-day decisions.
• Lead code reviews, give technical feedback, and support developers’ skills development.
• Contribute to architectural or design arbitrations while avoiding being the single point of contact.
• Improve delivery quality across design, testing, documentation, security, operability, and debt reduction.
• Identify risks and blockers and escalate when beyond the squad scope.

Description du poste

.NET / React / AWS Tech Lead – 12 months Contract – Paris, France

Hyrid – 3 days on site – 2 days remote

Muat be able to speak fluent French with a good command on English

Required: - 8 years of successful experience in software development, at least 18 months proven experience as a Tech Lead, lead developer or technical referent on a development team. .NET / C#. AWS. REST APIs, React. Microservices architecture. Unit testing, integration testing, and non-regression strategy. Git and CI/CD. Production culture and ability to diagnose incidents or application anomalies. Ability to provide technical support to a development team. Use of AI tools. Strong sensitivity to software quality, maintainability, security, operability, and cost. Experience in a SaaS, platform, microservices or high-volume product context.

Nice to have: - PostgreSQL, MongoDB, and Entity Framework. Hexagonal architecture / Clean architecture. Observability: logs, metrics, traces, alerting. Hands-on experience with AWS serverless or containerized services. Experience on critical, partner, financial, billing, reconciliation or data quality flows. Domain-Driven Design, CQRS, event-driven architecture or distributed integration patterns. Infrastructure as Code, including Terraform. Feature flags, rollback strategy, progressive deployments or canary deployments. Professional use of AI tools for code development, testing, documentation, or analysis.

Project context

Working in the B2B / B2B2C SaaS platform which is dedicated to electric vehicle charging services. Platform is built on a microservices architecture and AWS Cloud components

Goals and deliverables

Looking for a .NET / React / AWS Tech Lead service, with an operational and hands-on positioning. The expected profile must demonstrate an effective ability for local technical leadership, by intervening on code, code reviews, production diagnostics, technical arbitrations, squad management and developer skills development.

The Tech Lead is expected to be the technical referent for the Roaming field and the technical operational relay for the team. He or she must be able to understand the functional and technical issues, to assume the structuring choices, to clarify the expected standards, to advance collective practices, to support developers in their skills development and to make visible the risks requiring internal arbitration.

The main expectations, which are not exhaustive, are as follows:

• Provide local technical leadership to the squad, by clarifying the expected standards, leading useful technical exchanges and facilitating day-to-day decisions;
• Support developers in their skills development through technical feedback, demanding code reviews, knowledge sharing and individual technical support points;
• Contribute to developments, technical analyses and architectural or design arbitrations, while avoiding becoming the team's single point of contact;
• Strengthen the quality of delivery: design, testing, reviews, documentation, maintainability, security, operability and reduction of priority technical debt;
• Identify and report to internal management any risks, deviations, blockages or arbitration needs beyond the scope of the squad.

Production and operation expectations

• Integrate production constraints into technical choices: observability, diagnostics, rollback, security and operability;
• Contribute to the analysis of incidents, anomalies or unexpected behaviours, and propose appropriate corrective or preventive actions;
• Improve traceability, reliability of sensitive processing, and reconciliation or gap analysis capacity;
• Contribute to runbooks, support procedures, post-incident analysis and exchanges with application support teams

With over 90 years' combined experience, NES Fircroft (NES) is proud to be the world's leading engineering staffing provider spanning the Oil & Gas, Power & Renewables, Chemicals, Construction & Infrastructure, Life Sciences, Mining andManufacturingsectors worldwide. With more than 80 offices in 45 countries, we are able to provide our clients with the engineering and technical expertise they need, wherever and whenever it is needed. We offer contractors far more than a traditional recruitment service, supporting with everything from securing visas and work permits, to providing market-leading benefits packages and accommodation, ensuring they are safely and compliantly able to support our clients.